eBay

Wiseco Top & Bottom End Rebuild Kit

Please measure your cylinder bore before ordering

Fits: 2002-2018 Yamaha YZ85 47.5 mm bore

Top End:

Wiseco top end gasket kit is constructed of premium materials to produce the best sealing technology available exceeding OEM standards.

Superior strength/weight ratio utilizing aerospace alloy with race proven designs.

CNC machined with optimal cam shape and profile for peak HP and service life.

Premium top end needle bearing. Precision machined, highest quality materials for strength and reduced friction. High-performance ring set.

Extended life and sustained power.

Highest quality, alloy pin.

Consistently true and durable.

Specification:

Displacement: 85cc

Bore - Standard: 47.5mm

Bore - Actual: 47.50mm

Bore - Oversize: STD

Stroke: 47.8mm

Cylinders: 1

Note: Pro-Lite

Note: Ceramic Composite Bore

Contents:

1869CS - 47.50 MM RING SET (SINGLE)

805M04750 - YAMAHA YZ85 02-13 PRO-LITE 1869CS

B1012 - TOP END BEARING 14 X 18 X 16.2mm

CW14 - ROUND WIRE PIN LOCKS 14MM (PAIR)

S517 - PIN-14MM X 1.5098"-UNCHROMED-*2CY*

W5983 or alternate - GASKET KIT - YAMAHA YZ85 '02-13

Bottom End:

Each kit contains everything you need to complete your rebuild the right way, the first time- crankshaft and connecting rod, all applicable bearings, and complete bottom end gasket kit made to meet or exceed OEM.
Wiseco connecting rods are double forged from a dedicated forging and feature shot peening, oil slots, and coated bronze thrust washers.
Bottom end gasket kits are made from premium materials, exceeding OEM standards, to provide exceptional seal between critical mating surfaces.
Main bearings are manufactured to the highest quality standards. Each is case hardened for maximum life and smooth operation at high RPM’s.
Corrosion resistant surface treatment to prevent corrosion and pitting over long term use or storage. This will add to the life as well the strength of the assembly.
Top end of rod is bushed for oil retention and eliminates pin galling. The bottom end rod bores are case hardened to 58-62 RC to optimize bearing running surface.
The crank pin bearings are manufactured from the highest quality, hot rolled steel case hardened to 58-62 RC to extend the lifetime of the assembly.
Caged needle roller bearings to provide the highest possible RPM.

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